Orateur
Description
Studies of neutron induced reactions are of great interest, not only for their importance to fundamental research in Nuclear Physics but also for practical applications. Iron is a major structural material, widely used in nuclear technology applications, especially in nuclear reactors where it can be found in several places, from the core structures to reflectors, etc. For this reason, accurate neutron data are indispensable for the design and reliable operation of such facilities. Solving the observed discrepancies between the current evaluated nuclear data libraries of iron thanks to new experimental results in the fast neutron energy range constitutes an important objective for simulating advanced reactor systems, such as Generation-IV reactors.
New cross section measurements on Fe were carried out at the neutron time-of-flight facility GELINA. On the one hand, a scattering experiment was performed to determine the differential cross section of neutron elastic and inelastic scattering on 56Fe in the fast neutron energy region, using an enriched sample. For the detection of the scattered neutrons, the ELISA (ELastic and Inelastic Scattering Array) spectrometer was used. The array consists of 32 liquid organic scintillators and a 235U fission chamber for the measurement of the neutron flux. On the other hand, transmission experiments on natFe were performed at the 50 m measurement station of flight path 4. The moderated flux configuration (MFC) provided a neutron spectrum with energies from a few eV to hundreds of keV. The neutrons were detected by a Li-glass scintillator enriched in 6Li. Two natural iron metallic discs of 1.2 cm and 4.5 cm thickness were used.
In this presentation, the analysis procedure along with the results of each experiment are presented.
